Phase 10 section

Pokemon Emerald Marine Cave and Terra Cave Walkthrough

Marine Cave and Terra Cave section for the Pokemon Emerald walkthrough with wild Pokemon, trainers, items, coordinates, requirements, and strategy notes.

By Damodar Sharma Updated June 18, 2026 Walkthrough

Marine Cave and Terra Cave is a dedicated section page for Phase 10: Post-Game + Battle Frontier. Track the Weather Institute reports to catch Kyogre and Groudon.

Phase 10 asset set

Post-Game + Battle Frontier: S.S. Tidal, Battle Frontier, Frontier Brains, Steven, roaming Lati, and post-game dungeons.

Asset sourceLocal game logo and box art Badge artNo badge phase

Route Plan

Primary source maps covered here: Marine Cave Entrance, Marine Cave End, Underwater Marine Cave, Terra Cave Entrance, Terra Cave End. Follow this page as its own checklist, then return to the phase index when the wild Pokemon, trainers, items, and boss notes are complete.

Wild Pokemon

No wild Pokemon encounter table is sourced for this section.

Trainers

No mandatory trainer battles are sourced for this section.

Items

No visible, hidden, or scripted item pickups are sourced for this section.

Completion Checklist

Clear the main objective: Track the Weather Institute reports to catch Kyogre and Groudon.
Review every wild Pokemon method listed for the section.
Fight or deliberately skip every trainer listed in route order.
Collect visible items, hidden items, and scripted rewards you care about before moving on.

Source Notes

Source of truth: pret/pokeemerald wild_encounters.json, map map.json object/background events, map scripts.inc, trainers.h, and trainer_parties.h.
Encounter odds are aggregated by species and method from Emerald slot rates. Most rows are marked Any time because Emerald has no normal day/night wild encounter split.
Pokemon table sprites use locally cached Emerald front sprites from /guides/pokemon-emerald-pokemon-sprites.json.